Invariants
| Base field: | $\F_{97}$ |
| Dimension: | $2$ |
| L-polynomial: | $( 1 - 2 x + 97 x^{2} )( 1 + 2 x + 97 x^{2} )$ |
| $1 + 190 x^{2} + 9409 x^{4}$ | |
| Frobenius angles: | $\pm0.467624736821$, $\pm0.532375263179$ |
| Angle rank: | $1$ (numerical) |
| Jacobians: | $450$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $2$ |
This isogeny class is not simple, primitive, ordinary, and not supersingular. It is principally polarizable and contains a Jacobian.
Newton polygon
This isogeny class is ordinary.
| $p$-rank: | $2$ |
| Slopes: | $[0, 0, 1, 1]$ |
Point counts
Point counts of the abelian variety
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $9600$ | $92160000$ | $832973500800$ | $7834374144000000$ | $73742412698523888000$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $98$ | $9790$ | $912674$ | $88494718$ | $8587340258$ | $832974996670$ | $80798284478114$ | $7837433351159038$ | $760231058654565218$ | $73742412707554949950$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 450 curves (of which all are hyperelliptic):
- $y^2=60 x^6+96 x^5+22 x^4+50 x^3+22 x^2+96 x+60$
- $y^2=9 x^6+92 x^5+13 x^4+56 x^3+13 x^2+92 x+9$
- $y^2=49 x^6+35 x^5+60 x^4+14 x^3+15 x^2+81 x+72$
- $y^2=51 x^6+78 x^5+9 x^4+70 x^3+75 x^2+17 x+69$
- $y^2=41 x^6+70 x^5+88 x^4+40 x^3+88 x^2+70 x+41$
- $y^2=11 x^6+59 x^5+52 x^4+6 x^3+52 x^2+59 x+11$
- $y^2=73 x^6+28 x^5+7 x^4+24 x^3+39 x^2+10 x+73$
- $y^2=74 x^6+43 x^5+35 x^4+23 x^3+x^2+50 x+74$
- $y^2=31 x^6+17 x^5+6 x^4+30 x^3+90 x^2+61 x+29$
- $y^2=58 x^6+85 x^5+30 x^4+53 x^3+62 x^2+14 x+48$
- $y^2=35 x^6+84 x^5+55 x^4+90 x^3+55 x^2+84 x+35$
- $y^2=78 x^6+32 x^5+81 x^4+62 x^3+81 x^2+32 x+78$
- $y^2=19 x^6+33 x^5+17 x^4+20 x^3+17 x^2+33 x+19$
- $y^2=95 x^6+68 x^5+85 x^4+3 x^3+85 x^2+68 x+95$
- $y^2=94 x^6+25 x^5+4 x^4+54 x^3+4 x^2+25 x+94$
- $y^2=82 x^6+28 x^5+20 x^4+76 x^3+20 x^2+28 x+82$
- $y^2=26 x^6+38 x^5+72 x^4+91 x^3+72 x^2+38 x+26$
- $y^2=33 x^6+93 x^5+69 x^4+67 x^3+69 x^2+93 x+33$
- $y^2=56 x^6+62 x^5+67 x^4+96 x^3+66 x^2+83 x+13$
- $y^2=86 x^6+19 x^5+44 x^4+92 x^3+39 x^2+27 x+65$
- and 430 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{97^{2}}$.
Endomorphism algebra over $\F_{97}$| The isogeny class factors as 1.97.ac $\times$ 1.97.c and its endomorphism algebra is a direct product of the endomorphism algebras for each isotypic factor. The endomorphism algebra for each factor is: |
| The base change of $A$ to $\F_{97^{2}}$ is 1.9409.hi 2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-6}) \)$)$ |
Base change
This is a primitive isogeny class.